I discovered Sega Nerds by searching for "sega podcast" in iTunes, so I think you would be missing out if you didn't have SEGA in the title somewhere.
I would love it if it were weekly or Bi-Weekly. I drive a lot, so I listen to podcasts in the car, updated from my iTunes feed. You should have it divided into sections:
News
Listener feedback and mail,
questions (forums, twitter, facebook),
Reviews and New game discussion
Classic game feature of the week (or bi-week or whatever)
And I like where you invited different community members in your community podcast to participate. That should be enough material, even if there isn't a lot of SEGA news at some point.